US20050142439A1 - Pouch type lithium secondary battery - Google Patents

Pouch type lithium secondary battery Download PDF

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Publication number
US20050142439A1
US20050142439A1 US11/020,697 US2069704A US2005142439A1 US 20050142439 A1 US20050142439 A1 US 20050142439A1 US 2069704 A US2069704 A US 2069704A US 2005142439 A1 US2005142439 A1 US 2005142439A1
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US
United States
Prior art keywords
pouch
edges
groove
lithium secondary
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/020,697
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English (en)
Inventor
Sang-Ho Lee
Sang-Do Heo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung SDI Co Ltd
Original Assignee
Samsung SDI Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung SDI Co Ltd filed Critical Samsung SDI Co Ltd
Assigned to SAMSUNG SDI CO., LTD, reassignment SAMSUNG SDI CO., LTD, ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HEO, SANG-DO, LEE, SANG-HO
Publication of US20050142439A1 publication Critical patent/US20050142439A1/en
Priority to US12/487,877 priority Critical patent/US9190633B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H01M50/136—Flexibility or foldability
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/106—PTC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention is related to a lithium secondary battery. Specifically, the present invention is related to a pouch type lithium secondary battery where the electrode structure comprising a positive electrode, a negative electrode and a separator, is received in a pouch.
  • lithium secondary batteries use a non-aqueous electrolyte due to the reactivity of lithium with moisture.
  • the non-aqueous electrolyte may be a solid polymer containing a lithium salt or a liquid phase with a dissociated lithium salt in an organic solvent.
  • the lithium secondary battery may be classified as a lithium metal battery, a lithium ion battery using a liquid electrolyte, or a lithium ion polymer battery using a solid polymer electrolyte.
  • the lithium ion polymer battery can use a pouch instead of a metal can as a receptacle of an electrode assembly.
  • the pouch may comprise a multilayer film including a metal foil layer and a plastic layer which covers the metal foil layer.
  • a multilayer film including a metal foil layer and a plastic layer which covers the metal foil layer.
  • aluminum is used as metal constituting a foil in the multilayer film pouch.
  • a polymer layer forming an inner layer of the pouch film protects the metal foil against an electrolyte and simultaneously prevents a short circuit among a positive electrode, a negative electrode and electrode tabs.
  • an electrode assembly which is formed by laminating or laminating and then winding a positive electrode, separator and negative electrode, is placed into a pouch in a provisionally sealed state. Subsequently, an upper pouch film and a lower pouch film are thermally fused to each other in open edge portions of the pouch to form a bare cell battery of a sealed pouch type.
  • a protecting circuit module PCM
  • PTC positive temperature coefficient
  • a complete hard pack 15 battery is produced.
  • the hard case can be formed by using polypropylene resin and so forth without separately providing a circuit or an electrical conductor portion on its inner side, but the inside of the hard case may be provided with a separate accessory circuit or other electrical conductor portion dependent on a device for which the battery is used.
  • the core pack battery may be used in such a manner that it is directly attached to a product without a separate hard case.
  • flange-shaped lateral edges 23 which have been fused at the sealing of a pouch are shown in a state that they are folded toward the front, that is, in a direction forming a groove on both left and right sides of a core pack battery 100 having an approximately rectangular shape. Folding the lateral edges 23 reduces the battery in size by as much as the widths of the lateral edges 23 in order to remove unused space in the bare cell battery which is formed by fusing the edges to seal the pouch.
  • a protecting circuit module and other structure are connected to the battery around an upper side, from which electrode tabs 37 , 38 are drawn out, of four sides which forms a rectangle when viewed from the front of the core pack battery 100 .
  • the electrode tabs 37 , 38 are bent once or twice as shown in FIG. 2 .
  • the protecting circuit module 51 is located in an empty space defined by one wall surface 56 forming the groove 54 on the side from which the electrode tabs are drawn out, and both the left and right edges of the pouch folded toward the groove, so that the length of the whole battery can be reduced.
  • the metal foil constituting an intermediate layer of the pouch film is still exposed outside in end portions of the edges 23 . Since an electrical conductor portion of the protecting circuit module 51 is positioned spatially close to the folded edges 23 of the pouch when the core pack battery 100 has been formed, it is highly likely to be electrically connected to the edges 23 . If the electrical conductor portion of the protecting circuit module 51 is connected to the negative electrode of the battery in any manner, a possibility of a short circuit between the copper of the negative electrode and the aluminum foil is increased.
  • a short circuit between the metal foil of the pouch film and the negative electrode of the battery may occur by way of a circuit portion or other electrical conductor within the hard case or a battery box of a product for which the battery is used when the core pack battery is directly inserted into the hard case or the battery box. Otherwise, electrical connection may be established by a path passing through the metal foil of the pouch film, the electrical conductor of the protecting circuit module, the electrical conductor of the hard case or the battery box, and the negative electrode of the battery.
  • the aluminum foil may be subject to corrosion.
  • the corrosion 10 of the metal foil may be accelerated under an environment where leaked electrolyte component or moisture exists around the negative electrode tab in the pouch.
  • the polymer layer of the pouch film may prevent entrance of moisture and oxygen.
  • the lowering of blocking capacity of the pouch may give rise to abnormality of the battery. That is, if an is organic electrolyte of a gel type electrolyte separator evaporates or foreign moisture or oxygen intrudes into the battery, abnormal phenomena such as swelling occur, which results in the lifetime of the battery being discarded, deteriorated or shortened.
  • both the lateral edges 23 of the pouch are folded into halves to form overlapped edge portions 23 , as designated by FIG. 3 .
  • the width of the edges is reduced by half and ends 231 of the edges come into contact with portions of sidewall surfaces 541 constituting the groove 54 .
  • the overlapped edge portions are folded again toward the groove 54 resulting in the ends 231 becoming invisible to the exterior while being interposed between the edges 23 and the sidewall surfaces 541 constituting the groove 54 .
  • the protecting circuit module (not shown), which is connected to the electrode tabs 37 , 38 when they are bent, is located in a region B which is an empty space not occupied by the groove 54 of the pouch. Consequently, even if the edges 23 are foiled twice, the ends 231 of the edges are not shielded by the sidewall surfaces 541 of the groove 54 . In other words, the ends 231 of the edges are still exposed in that space, so that they are highly likely to be connected to the protecting circuit module or 10 the like, located in that space or elsewhere.
  • An object of the present invention is to provide a pouch type lithium secondary battery capable of preventing edge ends, in which a metal foil comprising at least one layer of a multilayer pouch film is exposed, from being electrically connected to other metals forming electrodes via a protecting circuit module, an electrical conductor within a hard case. That is, the present invention aims to provide a pouch type lithium secondary battery, which can prevent the metal foil from being subject to corrosion due to a short circuit between the metal foil and other metals.
  • a pouch type lithium secondary battery which comprises an electrode assembly which comprises a positive electrode, a separator and a negative electrode; and a pouch having a groove for receiving the electrode assembly and upper and lower portions of which are fused to each other around the groove to form flange-shaped edges, where the edges are at least partially covered at ends with an insulating material.
  • the insulating material may be constructed in such a manner that it covers the whole ends of the edges in the pouch, excluding a portion from which electrode tabs are drawn out, and may be formed by an adhesive tape or the like.
  • the pouch may have an approximately rectangular shape when viewed from a direction of the thickness of the groove, and the edges on both sides of the pouch may be folded in a direction forming the groove. If the adhesive tape constituting the insulating material is attached over a part of its width to the edges and is attached over the rest of its width to sidewall surfaces or a base surface of the groove with the ends of the edges as its starting point, the ends of the edges may be covered with the adhesive tape and simultaneously the folded edges can come to close contact with the groove of the pouch.
  • the insulating material has only to be attached to the ends of the edges in portions where a side for installing the protecting circuit module meets two lateral sides of the pouch so as to prevent a short circuit between the electrical conductor portion of the protecting circuit module and the metal foil of the pouch.
  • the side for installing the protecting circuit module may be the same as the side from which the electrode tabs are drawn out.
  • FIG. 1 is an illustration of a front view of one example of a core pack battery forming an approximately rectangular shape when viewed from a direction of a surface on which a groove for receiving an electrode assembly is formed.
  • FIG. 2 is an illustration of a perspective view of the example in FIG. 1 , which shows only a separate portion to which a protecting circuit module is connected.
  • FIG. 3 a view for explaining a way to fold flange-shaped edges twice on both left and right sides of a pouch.
  • FIG. 4 is a schematic perspective view showing a state in which a protecting circuit module is connected to a bare cell battery during the formation of a lithium secondary battery in accordance with one embodiment of the present invention.
  • FIG. 5 is a schematic front view of a core pack battery in accordance with another embodiment of the present invention.
  • FIG. 6 is a schematic perspective view of a core pack battery in accordance with still another embodiment of the present invention.
  • FIG. 7 is a front view of a lithium secondary battery in accordance with still yet another embodiment of the present invention.
  • FIG. 8 is schematic sectional view of a hard pack battery formed according to the present invention taken along a plane perpendicular to both the left and right sides of the pouch at which the edges are formed.
  • a rectangular pouch film which is generally formed as an integral body, is folded and bonded in the middle with respect to a longitudinal direction of one side to create upper and lower portions of the pouch.
  • the lower portion is formed with a groove in which an electrode assembly can be received.
  • the pouch film has a multilayer structure comprising a metal foil, such as aluminum, and polymer films such as a polypropylene resin film coated on upper and lower surfaces of the metal foil.
  • the electrode assembly may be formed in the shape of a jelly roll by laminating a positive electrode, a separator and a negative electrode to produce a multilayer film and winding the multilayer film in a scroll form.
  • the separator may be attached to an outer or inner electrode surface of the jelly roll during the formation of the jelly roll in order to prevent a short circuit between the positive electrodes and the negative electrode.
  • the positive electrode may be formed by a method in which a positive electrode collector made of a metal sheet having excellent electrical conductivity such as an aluminum foil is coated on both its surfaces with a positive electrode coating portion main ingredient of which is a lithium-based oxide.
  • a positive electrode tab is electrically connected to a region of the positive electrode collector, which is not formed with the positive electrode coating portion.
  • the negative electrode can be formed by coating both surfaces of a negative electrode collector made of a conductive metal sheet such as a copper foil with a negative electrode coating portion containing carbon material as a main ingredient.
  • the coating can be conducted in such a manner that an electrical conductor, a binder and other components are mixed to produce active material in a paste phase and the negative electrode collector is thinly covered with the active material in a paste phase.
  • a negative electrode tab is also electrically connected to a region of the negative electrode collector, which is not formed with the negative electrode coating portion.
  • the positive and negative electrode tabs are arrange side by side, are projected from the jelly roll in a is direction perpendicular to the winding direction of the jelly roll, and are drawn out from the pouch through one side of the sealed pouch.
  • the electrode tabs assume a form of a metal tab mostly made of aluminum, copper or nickel. These electrode tabs must have thickness and dimensions enough to flow an electric current there through without a notable voltage drop.
  • a specific component can be contained in the polymer film surface or a separate tape (not shown) containing the specific component can be previously attached to a portion of the pouch, to which the electrode tabs are adhere, before the sealing of the pouch. At this time, the tape also serves to prevent a short circuit between the both the electrode and the electrode tabs.
  • the positive and negative electrodes and the electrode tabs may be arranged while having different polarities.
  • the edges 23 , 23 ′ take a shape of a flange on at least three sides of four sides around the groove 54 when the upper and lower portions of the pouch are in a fused state.
  • an insulating tape 201 may be attached to the ends of the edges 23 along both lateral sides connected to a side from which the electrode tabs 37 , 38 are drawn out, so that the metal foil of the ends is not exposed.
  • the edges 23 of both of the lateral sides may be then folded in a forming direction of the groove.
  • structures such as a protecting circuit module 51 , a positive temperature coefficient (PTC) may be attached to the positive and negative electrode tabs 37 , 38 of the bare cell battery in a conventional manner to form a core pack battery 100 .
  • PTC positive temperature coefficient
  • an electrical conductor portion of the protecting circuit module 51 may be still positioned spatially close to the folded edges 23 of both the lateral sides of the pouch.
  • the metal foil at the ends of the edges 23 may be shielded by the insulating tape 201 , however, there is no fear of electrical connection of the metal foil with the electrical conductor portion of the protecting circuit module 51 .
  • the insulating tape 201 also prevents the metal foil from being electronically connected at the ends of the forked edges 23 of the pouch with the electrical conductor portion. Accordingly, there is no fear of a short circuit between the metal foil and the negative electrode of the battery through the electrical conductor portion within the hard case.
  • the process of attaching the tape may not performed until the process of folding the edges has been completed.
  • a tape 203 may be attached over one half width to the edges and may be attached over the other half width to sidewall surfaces or a base surface constituting the groove 54 .
  • the tape 203 may prevent the exposed metal foil from being electrically connected to other electrical conductor portions and simultaneously serves to bring the folded edges 23 into close contact with the groove and thusly to neatly finish external appearance. This may overcome the problem created by the folded edges to the subsequent processes, for example, the process of inserting the core pack battery 100 into the hard case.
  • the edges 23 of both the lateral sides of the pouch may be folded twice. Therefore, in a portion A formed with the groove 54 along both the lateral sides of the pouch, the metal foil of the ends 231 of the edges is not exposed. However, in both upper corner portions B of the pouch, that is, portions defining a space for locating the protecting circuit module 51 in the core pack battery 100 , the ends 231 of the edges 23 may be covered with an insulating tape 205 . Consequently, even if the electrical conductor portion of the protecting circuit module 51 is positioned close to the ends 231 of the edges, there is no fear of a short circuit between the metal foil of the pouch and the electrical conductor portion of the protecting circuit module. In this embodiment, since the ends 231 are not exposed in most part of the edges and the insulating tape 205 may be attached to only both the upper corners in which the metal foil is exposed, the tape attachment work is simpler than in other embodiments.
  • two core pack 200 may be coupled to each other to form one battery. Both left and right edges of each core pack 200 may be folded twice. Similar FIG. 6 as described above, where the battery may be formed by one core pack, an insulating tape 207 may be attached to both upper corners of each core pack 200 in this embodiment. Thus, the tape may prevent the metal foil exposed at the corners from being electrically connected to the electrical conductor portion of the protecting circuit module 51 adjacent thereto.
  • Reference numeral “216” designates electrical conductive wires coming out of the two core packs.
  • an accessory circuit 63 may be further provided on an inner surface of the hard case 60 opposite to a lower portion of the core pack battery 100 , which may be formed with the groove. Regardless of whether the accessory circuit 63 exists, the manner of constructing the accessory circuit may be determined by characteristics of the electrical electronic device for which the battery may be used. Most of an inner space of the hard case 60 may be fixed with the core pack battery 100 including the electrode assembly. An upper surface of the core pack battery 100 may be adhered to the inner surface of the hard case 60 by a double-faced tape 65 , so that the core pack battery 100 can be securely mounted to the hard case.
  • edges 23 of the pouch which are folded in a forming direction of the groove in one embodiment of the present invention, may be positioned spatially close to an electrical conductor portion of the accessory circuit 63 on the inner surface of the hard case 60 .
  • the ends of the edges have been already covered with the insulating tape. Accordingly, electrical connection between the metal foil of the pouch and the electrical conductor portion may be prevented even if the ends of the edges come to contact with the electrical conductor portion on the inner surface of the hard case 60 , and a short circuit between the metal foil and the negative electrode of the battery is also prevented even though the negative electrode of the battery is connected to the electrical conductor portion.
  • the insulating tape may be attached to places where the ends of the edges of the pouch are exposed so as not to bring the ends into direct contact with other parts constituting the battery, thereby preventing a short circuit between the metal foil of the pouch and the negative electrode of the battery.
  • the present invention may overcome the problem of the metal foil being incapable of being able to serve as a barrier to moisture or oxygen due to the electrical connection of the metal coil with the negative electrode and thus the corrosion of the metal foil.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
US11/020,697 2003-12-26 2004-12-27 Pouch type lithium secondary battery Abandoned US20050142439A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/487,877 US9190633B2 (en) 2003-12-26 2009-06-19 Pouch type lithium secondary battery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2003-97353 2003-12-26
KR1020030097353A KR100561284B1 (ko) 2003-12-26 2003-12-26 파우치형 리튬 이차 전지

Related Child Applications (1)

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US12/487,877 Continuation US9190633B2 (en) 2003-12-26 2009-06-19 Pouch type lithium secondary battery

Publications (1)

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US20050142439A1 true US20050142439A1 (en) 2005-06-30

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US11/020,697 Abandoned US20050142439A1 (en) 2003-12-26 2004-12-27 Pouch type lithium secondary battery
US12/487,877 Active 2025-03-09 US9190633B2 (en) 2003-12-26 2009-06-19 Pouch type lithium secondary battery

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US12/487,877 Active 2025-03-09 US9190633B2 (en) 2003-12-26 2009-06-19 Pouch type lithium secondary battery

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US (2) US20050142439A1 (ko)
JP (2) JP4249117B2 (ko)
KR (1) KR100561284B1 (ko)
CN (1) CN100483835C (ko)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060222939A1 (en) * 2005-03-31 2006-10-05 Aamodt Paul B Hinged electrode cup and methods of fabrication for medical grade electrochemical cells
US20070037044A1 (en) * 2005-08-12 2007-02-15 Sony Corporation Secondary battery
US20090023058A1 (en) * 2007-07-20 2009-01-22 Samsung Sdi Co., Ltd. Pouch-type secondary battery
US20090109099A1 (en) * 2007-10-30 2009-04-30 Samsung Sdi Co., Ltd. Protective circuit module and secondary battery pack including the same
US20090176155A1 (en) * 2008-01-04 2009-07-09 Samsung Sdi Co., Ltd. Squeeze pin and secondary battery using the same
US20100316893A1 (en) * 2009-06-15 2010-12-16 Samsung Sdi Co., Ltd. Secondary battery including protection circuit module and method for manufacturing the same
US20100316895A1 (en) * 2007-12-11 2010-12-16 Evonik Degussa Gmbh Battery pack
WO2011003520A1 (de) * 2009-07-10 2011-01-13 Li-Tech Battery Gmbh Verfahren zum herstellen einer elektrochemischen zelle
US20110236732A1 (en) * 2010-03-23 2011-09-29 International Battery, Inc. Package for large format lithium ion cells
EP2492989A1 (en) * 2011-02-24 2012-08-29 Samsung SDI Co., Ltd. Pouch type battery and method of manufacturing the same
US20130130065A1 (en) * 2011-11-17 2013-05-23 Kyung-ho Park Rechargeable battery pack
EP2634831A1 (en) * 2012-03-02 2013-09-04 Samsung SDI Co., Ltd. Pouch type secondary battery
US20140065474A1 (en) * 2012-08-30 2014-03-06 Apple Inc. Low z-fold battery seal
US8916284B2 (en) 2006-09-04 2014-12-23 Lg Chem, Ltd. Battery cell with small groove at surface and battery pack including the same
US20150118543A1 (en) * 2012-05-14 2015-04-30 Eig Ltd. Pouch-type battery with improved safety by coating sealing unit with flame retardant and heat resistant resin composition prepared by mixing flame retardant material and heat resistant material to thermoplastic resin or thermosetting resin and production method thereof
US9196894B2 (en) 2012-06-08 2015-11-24 Samsung Sdi Co., Ltd. Rechargeable battery pack
US20160056430A1 (en) * 2014-08-20 2016-02-25 Ford Global Technologies, Llc Cell To Cell Terminal Connections For A High Voltage Battery
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JP2008288219A (ja) 2008-11-27
CN100483835C (zh) 2009-04-29
JP4249251B2 (ja) 2009-04-02
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KR20050066120A (ko) 2005-06-30
JP4249117B2 (ja) 2009-04-02

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